1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/*
* Copyright (C) 2012 Google Inc.
*/
package com.android.bluetooth.btservice;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.content.Intent;
import android.os.Message;
import android.util.Log;
import com.android.bluetooth.Utils;
import com.android.bluetooth.btservice.RemoteDevices.DeviceProperties;
import com.android.internal.util.State;
import com.android.internal.util.StateMachine;
import java.util.ArrayList;
/**
* This state machine handles Bluetooth Adapter State.
* States:
* {@link StableState} : No device is in bonding / unbonding state.
* {@link PendingCommandState} : Some device is in bonding / unbonding state.
* TODO(BT) This class can be removed and this logic moved to the stack.
*/
final class BondStateMachine extends StateMachine {
private static final boolean DBG = true;
private static final String TAG = "BluetoothBondStateMachine";
static final int CREATE_BOND = 1;
static final int CANCEL_BOND = 2;
static final int REMOVE_BOND = 3;
static final int BONDING_STATE_CHANGE = 4;
static final int BOND_STATE_NONE = 0;
static final int BOND_STATE_BONDING = 1;
static final int BOND_STATE_BONDED = 2;
private AdapterService mAdapterService;
private Context mContext;
private AdapterProperties mAdapterProperties;
private RemoteDevices mRemoteDevices;
private PendingCommandState mPendingCommandState = new PendingCommandState();
private StableState mStableState = new StableState();
public BondStateMachine(AdapterService service, Context context,
AdapterProperties prop, RemoteDevices remoteDevices) {
super("BondStateMachine:");
addState(mStableState);
addState(mPendingCommandState);
mRemoteDevices = remoteDevices;
mAdapterService = service;
mAdapterProperties = prop;
mContext = context;
setInitialState(mStableState);
}
public void cleanup() {
}
private class StableState extends State {
@Override
public void enter() {
infoLog("StableState(): Entering Off State");
}
@Override
public boolean processMessage(Message msg) {
if (msg.what == SM_QUIT_CMD) {
Log.d(TAG, "Received quit request...");
return false;
}
BluetoothDevice dev = (BluetoothDevice)msg.obj;
switch(msg.what) {
case CREATE_BOND:
createBond(dev, true);
break;
case REMOVE_BOND:
removeBond(dev, true);
break;
case BONDING_STATE_CHANGE:
int newState = msg.arg1;
/* if incoming pairing, transition to pending state */
if (newState == BluetoothDevice.BOND_BONDING)
{
sendIntent(dev, newState);
transitionTo(mPendingCommandState);
}
else
{
Log.e(TAG, "In stable state, received invalid newState: " + newState);
}
break;
case CANCEL_BOND:
default:
Log.e(TAG, "Received unhandled state: " + msg.what);
return false;
}
return true;
}
}
private class PendingCommandState extends State {
private final ArrayList<BluetoothDevice> mDevices =
new ArrayList<BluetoothDevice>();
@Override
public void enter() {
infoLog("Entering PendingCommandState State");
BluetoothDevice dev = (BluetoothDevice)getCurrentMessage().obj;
}
@Override
public boolean processMessage(Message msg) {
if (msg.what == SM_QUIT_CMD) {
Log.d(TAG, "PendingCommandState(): Received quit request...");
return false;
}
BluetoothDevice dev = (BluetoothDevice)msg.obj;
boolean result = false;
if (mDevices.contains(dev) &&
msg.what != CANCEL_BOND && msg.what != BONDING_STATE_CHANGE) {
deferMessage(msg);
return true;
}
switch (msg.what) {
case CREATE_BOND:
result = createBond(dev, false);
break;
case REMOVE_BOND:
result = removeBond(dev, false);
break;
case CANCEL_BOND:
result = cancelBond(dev);
break;
case BONDING_STATE_CHANGE:
int newState = msg.arg1;
sendIntent(dev, newState);
if(newState != BluetoothDevice.BOND_BONDING )
{
/* this is either none/bonded, remove and transition */
result = !mDevices.remove(dev);
if (mDevices.isEmpty()) {
transitionTo(mStableState);
}
}
else if(!mDevices.contains(dev))
result=true;
break;
default:
Log.e(TAG, "Received unhandled event:" + msg.what);
return false;
}
if (result) mDevices.add(dev);
return true;
}
}
private boolean cancelBond(BluetoothDevice dev) {
if (dev.getBondState() == BluetoothDevice.BOND_BONDING) {
byte[] addr = Utils.getBytesFromAddress(dev.getAddress());
if (!mAdapterService.cancelBondNative(addr)) {
Log.e(TAG, "Unexpected error while cancelling bond:");
} else {
return true;
}
}
return false;
}
private boolean removeBond(BluetoothDevice dev, boolean transition) {
if (dev.getBondState() == BluetoothDevice.BOND_BONDED) {
byte[] addr = Utils.getBytesFromAddress(dev.getAddress());
if (!mAdapterService.removeBondNative(addr)) {
Log.e(TAG, "Unexpected error while removing bond:");
} else {
if (transition) transitionTo(mPendingCommandState);
return true;
}
}
return false;
}
private boolean createBond(BluetoothDevice dev, boolean transition) {
if (dev.getBondState() == BluetoothDevice.BOND_NONE) {
infoLog("Bond address is:" + dev);
byte[] addr = Utils.getBytesFromAddress(dev.getAddress());
if (!mAdapterService.createBondNative(addr)) {
sendIntent(dev, BluetoothDevice.BOND_NONE);
return false;
} else if (transition) {
transitionTo(mPendingCommandState);
}
return true;
}
return false;
}
private void sendIntent(BluetoothDevice device, int newState) {
DeviceProperties devProp = mRemoteDevices.getDeviceProperties(device);
int oldState = devProp.getBondState();
if (oldState == newState) return;
devProp.setBondState(newState);
Intent intent = new Intent(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
intent.putExtra(BluetoothDevice.EXTRA_BOND_STATE, newState);
intent.putExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, oldState);
mContext.sendBroadcast(intent, AdapterService.BLUETOOTH_PERM);
infoLog("Bond State Change Intent:" + device + " OldState: " + oldState
+ " NewState: " + newState);
}
void bondStateChangeCallback(int status, byte[] address, int newState) {
BluetoothDevice device = mRemoteDevices.getDevice(address);
if (device == null) {
errorLog("No record of the device:" + device);
return;
}
infoLog("bondStateChangeCallback: Status: " + status + " Address: " + device
+ " newState: " + newState);
Message msg = obtainMessage(BONDING_STATE_CHANGE);
msg.obj = device;
if (newState == BOND_STATE_BONDED)
msg.arg1 = BluetoothDevice.BOND_BONDED;
else if (newState == BOND_STATE_BONDING)
msg.arg1 = BluetoothDevice.BOND_BONDING;
else
msg.arg1 = BluetoothDevice.BOND_NONE;
sendMessage(msg);
}
private void infoLog(String msg) {
Log.i(TAG, msg);
}
private void errorLog(String msg) {
Log.e(TAG, msg);
}
}
|
